Paper-box machine.



No. 894,030. PATENTED JULY 21, 1908. A. W. MITCHELL.

PAPER BOX MACHINE.

APPLICATION I'ILED no.2 1 o 9 7 2 SHEETS-SHEET 1.

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No. 894,030. PATENTED JULY 21, 1908. A. w. MITCHELL.

PAPER BOX MACHINE.

APPLICATION FILED DEC. 2, 1907.

v 2 SHEETS-.SHEET 2.

[V/T/VEJSEJ UNITED STATES PATENT OFFICE.

ALBERT W. MITCHELL, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE NEW ENGLAND PAPER BOX MACHINE 00., OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CON- NECTIOUT.

PAPER-BOX MACHINE.

Specification of Letters Patent.

Patented July 21, 1908.

To all whom it may concern:

Be it known that I, ALBERT W. MITCHELL, a citizen of the United States of America, residing in the city of New Haven, in the county of New Haven and State of Connectiout, have invented certain new and useful Improvements in Paper-Box Machines, of which the following is a specification.

My invention relates to that part of the paper box mechanism which has to do with the coaction of the plunger and die for forming the box blank into box form, and the object of my invention is to provide means whereby the lunger may enter the partially folded blan with certainty and without danger of catching upon the folded sides of the blank and crushing them.

In the accompanying drawings I have shown my invention as applied to a box folding machine of the construction described and claimed in my Patent 852,974, May 7, 1907, but as will later be seen, my invention may be applied to other constructions of paper box machines in which a plunger is arranged to enter a partially folded box blank and force it into a die.

In the accompanying drawings Figure 1 is a vertical section on the line 11, Fig. 3: Fig. 2 is a similar view but showing the plunger as having entered the partially folded box blank and about to force it into the die; Fig. 3 is a sectional plan view on the line 3-3, Fig. 1: and Fig. 4 is a sectional view on the line 4-4, Fig. 1.

In these views A is the bed plate of the machine, containing the box-forming die D, over which the box blanks X, previously out, scored and asted, and with their opposite sides as, x, fo ded up at right angles to the bottom are intermittently fed across the table as indicated by the arrow, Fig. 3. On opposite sides of the die opening guide plates or side walls F, F are mounted on the table to support the upturned sides m, 00, of the box. In the guide F and in the bed plate is a slot f for the passage of the arm p which carries the plunger P, Fig. 1. As in the machine of my above described patent, plungers P carried by an endless chain P travel down through the die D, the chain being guided in grooves in the uprights B. As each plunger P descends onto the partially folded blank which has been fed in between the guides or walls F, F there is danger of the plunger catching on the sides of the box blank and crushing them. To revent this, I provide hinged spring cli s and M in connection with the side wal s F and F The clip M is shown as hinged above upon two uprights m, m, with the lower end of the clip lying inside the wall F, being normally pushed inward by a s ring 8, as far as the hook h carried by the c ip M will permit. Similarly the clip M is hinged at m to the upright B, and its lower end lies on the inside of the wall F being normally projected inwardly by a spring 8 as shown in Fig. 1. Thus as illustrated in the figure, the box blank with its upwardly folded sides being fed across the table to a position over the die D ready for the plunger, the lower ends of the clips M, M will lie over the upper ends of the said sides 90. Then when the plunger P descends, it will first come into contact with clips M, M and pushing them outwardly towards the walls F, F, will be guided by the clips with certainty into the box blank as shown in Fig. 2. As the plunger P passes on and carries the blank down into the die D, the clips M will be freed and under the influence of their springs s, s, will return to their positions shown in Fig. 1.

I claim as my invention 1. The combination of the plunger and die of a paper box machine and guide walls for the partially folded box blank with clips to lie over the upper edges of the folds where the plunger enters the blank.

2. The combination of the plunger and die of a paper box machine and guide walls for the partially folded box blank with hinged spring clips to lie over the upper edges of the folds where the plunger enters the blank.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

ALBERT W. MITCHELL.

Witnesses:

HENRY A. L. I-IALL, HARRY I-I. ATWATER. 

